The Ultimate Guide to Fixing a Radiator Cap That Won't Hold Pressure

You must change your radiator cap if it broken, otherwise It won't hold the pressure and more coolant will overflow into overflow bottle and ... If there are any issues, replace the cap. Your mechanic can use a pressure tester to verify that your radiator cap is opening and closing at the ... The radiator cap seals are damaged. The radiator cap valve is stuck. The radiator cap doesn't hold pressure. Common Bad Radiator Cap Symptoms. Take the cap adapter and screw it onto the pressure tester's end. Keep screwing until you cannot screw it anymore. If you don't know what the ... I'd stay with 16 PSI radiator cap. It raises the boiling temp of coolant and also is a high pressure limiter for the cooling system. > replace the cap. ... > leaking. Wonder if I should replace the cap. Rad caps get old and REFUSE to hold pressure, which will cause boiling. Release Pressure – Before removing the radiator cap, release any remaining pressure in the cooling system. Cover the cap with a towel or thick cloth to protect ... In normal use, the pressure will never be anywhere near 1.4Bar, much less 2.0. Before you replace the rad make sure that it is leaking and not the cap. I have had many aftermarket caps leak. The easiest fix for a new cap is ... The cap should vent at 16psi. When it's cold there shouldn't be any pressure under there as it should be linked to your overflow bottle to vent excess pressure ...